Pecan Pumpkin Dessert

I know pumpkin season will soon be past but I had this recipe for a potluck I went to. This is yummy and great dessert for gatherings as it makes many servings.

1 29 ounce can pumpkin
1 can evaporated milk
1 C sugar
3 eggs
1 teaspoon vanilla
1 package yellow cake mix
1 C melted butter or margarine
1 1/2 C chopped pecans (walnuts is fine too)
Frosting for cake
1 package 8ounce cream cheese
1 1/2 C powdered sugar
1 teaspoon vanilla
1 12ounce carton Cool Whip

Line a 13X9X2 in. pan with waxed paper and coat with cooking spray-set aside.
In a mixing bowl combine pumpkin, milk, and sugar. Beat egg and vanilla into pumpkin mix and pour into pan. Sprinkle with dry cake mix-drizzle with melted butter over all and sprinkle nuts evenly over and bake at 350* for one hour.
Cool completely in pan over wire rack- invert onto large serving tray. Remove waxed paper-beat cream cheese, pwd. sugar, and vanilla until smooth. Fold in cool whip and frost dessert. Refrigerate, yields 16 servings. I found that you can half the amount of frosting. This is a great dessert to make and let cool overnight and then frost.